package kr.hkit.powerjava.chapter24.work;

import java.io.*;
import java.util.ArrayList;

public class StudentDao implements InterfaceStudent<Student> {
	private static final String FILE = "stdList.data";
	private ArrayList<Student> arList;
	
	public StudentDao() {
		loadList();
	}

	@Override
	public void insertItem(Student item) {
		arList.add(item);
	}

	@Override
	public void deleteItem(Student item) {
		arList.remove(item);
	}

	@Override
	public void updateItem(Student item) {
		arList.set(arList.indexOf(item), item);
	}

	@Override
	public void prnItem() {
		for(Student std : arList) {
			System.out.println(std);
		}
	}
	
	public void prnItem(ArrayList<Student> List) {
		for(Student std : arList) {
			System.out.println(std);
		}
	}
	
	@Override
	public Student searchItem(Student item) {
		if(arList.contains(item)) {
			return arList.get(arList.indexOf(item));
		}else {
			return null;
		}
		
	}

	@Override
	public void loadList() {
		ObjectInputStream ois = null;
		try {
			ois = new ObjectInputStream(new BufferedInputStream(new FileInputStream(StudentDao.FILE)));
			arList = (ArrayList<Student>)ois.readObject();
		} catch (Exception e) {
			File file = new File(StudentDao.FILE);
			try {
				file.createNewFile();
				arList = new ArrayList<>();
			} catch (IOException e1) {
				e1.printStackTrace();
			}
			System.err.print(e);
		} finally {
			if(ois != null) try{ois.close();}catch(Exception e) {}
		}
	}

	@Override
	public void saveList() {
		ObjectOutputStream oos = null;
		
		try {
			oos = new ObjectOutputStream(new BufferedOutputStream(new FileOutputStream(StudentDao.FILE)));
			oos.writeObject(arList);
			oos.flush();
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			if(oos != null)try {oos.close();} catch (Exception e) {}
		}
		
		
	}
	
}
